28268031 has 16 divisors (see below), whose sum is σ = 41545728. Its totient is φ = 16953600.

The previous prime is 28268003. The next prime is 28268033. The reversal of 28268031 is 13086282.

It is not a de Polignac number, because 28268031 - 2⁵ = 28267999 is a prime.

It is a super-2 number, since 2×28268031² = 1598163153233922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28268031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215 + ... + 7616.

It is an arithmetic number, because the mean of its divisors is an integer number (2596608).

Almost surely, 2^28268031 is an apocalyptic number.

28268031 is a deficient number, since it is larger than the sum of its proper divisors (13277697).

28268031 is a wasteful number, since it uses less digits than its factorization.

28268031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8942.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 28268031 is about 5316.7688495928. The cubic root of 28268031 is about 304.6247503703.

The spelling of 28268031 in words is "twenty-eight million, two hundred sixty-eight thousand, thirty-one".